Pulverizer



Nov. 8, 1932. A. F. WILLIAMS iULVERIZER Original Filed May 13, 1929 INVEN TOR.

l 4* k v a BY ARTHUR [Wu/.04:

TTORNEY.

Patented Nov. 8, 1932 ARTHUR F1 wr LnIA Ms, on s'r. Louis, arissounr essrsnonf TO WILLIAMS; PATENT on ivrissounr onusnna AND rurvnnrznn COMPANY,

or sr. ouis, .Mrsso'URI, A, CORPORATION "PULVERIZER Reining-of abandoned application Serial No. 352,678, filed May 13,1929. This application filed April 14,

1932. Serial My invention relates to new and useful improvements in pulverizers and more particularly to that class of machines known as the ring'type' in: which the reduction of material is'ica-us'ed by "a plurality of' rings rotating. within a ipulverizing chamber. The rings are freely mounted and revolve on ",He'retofore, it has been, customary. to mount the: rings directly on the rotor disk.

This caused'several faultswhich restrict-ed the Fuse of the machines. If themachines vwereaoperated at other than relatively slow speeds, excessive vibration resulted,.and to alter the fineness of the productit was necessary to make a major change in the machine, suchas the substitution of different sized rings. .Also, there is a tendency when the ring is mounted directly on the fixedshaft for the inner ring surfac'eto become grooved so that all wear takes place against one portion of the outer face of said ring. I Having these faults in mind, the principal-object of my invention is to provide a p'ulverize'r in which the rings are'inounted on arshaft movable in relation to the main Another object of my inventionis to pro Vide means for adjusting the rings relatively to the'grinding surface of the pulverizing chamben. i Afurthenobject is to restrict the size of the disks from which the rings are supported, thus making a more compact structure of the rotor. r V

Withthe foregoing and other objects in View, my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawing, in which Figure 1 is a vertical longitudinal section through my improved pulverizer illustrating the rings in extended position as when in op eration.

Figure 2 is a vertical transverse section taken on line 22 of Figure 1. I

Referring by numerals to the accompanying drawing, 1 indicates the base section of my improved pulverizer and includes all that portion of the machine below the medial their axes- No. seams;

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line:- A shaft is journaled at the upper edge of the base 1 and'traverses this member. 3 is a cage whichcomprises a semi-cylindrical section fixed in the base 1 and arranged concentricwith shaft 2' Cage 3. comprises preferably a plurality of transversely mounted bars 4 which maybe of any desired shape and which are spacedaccording tot-he work 'tobe done. The top 5 is suitably connected to base 1 sot-hat it maybe freely removed therefrom.-, Topf5 includes a feed spout 6 atrthe front, portion-ofthe machine.

Fixed to shaft2 is a plurality of: rotor disks 7 Which are held in spaced apart relation by their hub portions 7a. Each disk 7 is provided with a plurality of apertures 8 arranged ingroups, and the apertures of each group are disposed various distances away from the axisof shaft- 2.; i v In the instant case there are'four groups of apertures in each disk and when said disks are arranged onshaft 2 the apertures ofeach group of each disk are aligned with apertures of the corresponding groups of the. other disks. V

A red or shaft 9 extends through a selected group of alignedfapertures of said disks and is secured in position in said'disks in any suitable manner. a j p A plurality of arms;- 10 are pivotally mounted at theirinner ends'on each rod "9 between each pair oflspaced' disks 2.

Bypla'cing'the apertures f each group at different radii relatively to the axis of rotation, shaft?) and arms 10 carried thereby can be radially adj Listed toward or'away from shaft 2. The outer end of each arm 10 is provided with two or more openings lland 12arranged longitudinally of the arm. The outer-openingsdl of all of the arms of one group are. in axialalignment with each other and the inner openings 12'are arranged likewise.

A horizontally disposed shaftior rod 14 pass-esthrough one set of openings, in the present instance the set numbered 11, and is secured in position in any suitable manner.

A plurality of rings-leis arranged on each rod 14:- and each ring is disposed between each pair of adjacent arms 10.. Rings lUU 15 have an enlarged central opening and are loosely mounted on rods 14 and each ring therefore has a certain amount of inward movement.

It will be noted that rings 15'may be adjusted radially with respect to the axis of rotation and toward or awayfrom the cage 3 by shifting the positions of the outer rods 14: or by shifting the inner rods S).v The rotor disks? are of relatively small diameter, and the machine is, therefore, capable of handling pieces of large size for reduction. 1

In the operation of my improved pulverizer, material to be reduced is fedthrough hopper or spout 6 into the pulverizing chamher where it is acted upon by the rapidly rotating rings 15. These rings are held in extended positions by centrifugal force, as illustrated in the drawing] Should an unusually large particle of material be fed into the'machine, it is possible for the rings, due to their flexible mounting, to yield and achieve the reduction ofsuch large piece by a series of blows delivered by the following rings rather than forcing the reductionofthe piece by the first rings. The rings are adjustable radially SOlilliltreduction of material of varying degrees of fineness can be had by spacing the rings toward or 'away from the cage.

Due to the fact that the rings areloosely carried on rods 14 and the latter are pivotally mounted on the rotor disks 7 it is possible to operate my machine at a much higher speed than has heretofore been practicable with machines of the ring type.

It is a Well-known fact-that the operation of such a machine at a high speed 'is a much more efficient method of operation because power consumption is regular and there are no periodical strainson themechanism which might cause undue wear possible breaka e. This application is a substitute for an application filed by me'May 13, 1929, Serial No. 362,678.

It is to be; understood that minor changes in the size, form and construction of the various parts of my improved pulverizer may be made and substituted for those herein shown and described, without departing from the spirit thereof.

I claim:

1. Ina pulverizer, a casing, and a rotor mounted for operation within said casing, said rotor comprising a main shaft, a plu ralit-y of disks fixed to. said main shaft, a radially adjustable shaftfixed in said disks, a plurality of pivotally connected arms mounted on'said disk shaft, a radially adjustable shaft carried by said arms, and'a plurality of looselymounted rings on said last mentioned shaft 2. In a pulverizer, a casing, a rotor mounts ed for operation within said casing, said rotor comprising a main shaft, 21. pluralit of disks fixed on said main shaft, a she mounted near the periphery ofsaid disks and parallel to said main shaft, a plurality of pivotal arms on said disk shaft, a radiallyrotor having mounted thereon a pair of PlV- otally connectedradial adjustable arms, a shaft mounted in the free ends of and connecting said pivotal arms, said shaft being radially adjustable relative to said rotor, and a ring loosely mounted onsaid shaft.

4'. In a pulverizer of the class described, the combination of a casing, a shaft journaled therein, a plurality of spacedeapart rotor disks fixed. on said shaft, .a plurality of arms pivotally mounted on said-disks, each arm being provided at its outer end'with a plurality of apertures arranged at difierent radii from said shaft, said arms being arranged in a plurality of groups, the respective, apertures of each group being axially aligned, a rod extending through one series of the aligned apertures of each group and carried by the arms of said groups, and a plurality of rings loosely mounted-on each 1 rod between the outer ends of said arms.

5. In a pulverizer of the class described, the combination with arevoluble' shaft and a plurality of spaced-apartldisks fixed there on, of a plurality of arms pivotally mounted on said disks and extending radially outward from said shaft, each arm being provided at its outer end with a plurality of apertures arranged at varying radii relatively to said shaft, said arms being arranged in groups and the respective aperturesof each group being axially aligned, a rod extending through one series of apertures of each group and carried by said arms parallel with said shaft, and a plurality of rings loosely disposed on each rod between the outerends of said arms. 7 I

In testimony whereof I hereunto afiix my signature this 75th day of April, 1932.

ARTHUR F. WILLIAMS. 

